Frame for gyratory crushers



Feb. 7, 1967 H. BALMEIR ETAL 3,302,896

FRAME FOR GYRATORY CRUSHERS Original Filed Nov. 14, 1961 5 Sheets-Sheetl H. BALMER ETAL FRAME FOR GYRATORY CRUSHERS Feb. 7, 1967 3 Sheets-SheetOriginal Filed Nov. 14,

z m j OMW WMV may M N /K 61w 5 r m a wM M a xww H. BALMER ETAL FRAME FORGYRATORY CRUSHERS Feb. 7, 1967 5 Sheets-Sheet 3 Original Filed Nov. 14,1961 United States Patent 3,302,896 FRAME FUR GYRATORY CRUSHERS Hansjorglialmer, Langenthal, Bern, Switzerland, and Rudolph .l. Gasparac,Milwaukee, Wis., assignors to Nordberg Manufacturing Company, Milwaukee,Wis, a corporation of Wisconsin Original application Nov. 14, 1961, Ser.No. 152,222, now Patent No. 3,140,835, dated July 14, 1965. Divided andthis application Apr. 8, 1964, Ser. No. 358,265 3 Claims. (Cl. 241-285)This is a division of US. Patent No. 3,140,835, issued July 14, 1964.

This invention is in the field of material reduction machines and isconcerned, among other things, with an improved gyratory crusher.

A primary object of the invention is an improved gyratory crusher whichis efficient in use.

Other objects will appear from time to time in the ensuing specificationand drawings in which:

FIGURE 1 is a vertical section of a gyratory crusher;

FIGURE 2 is an enlarged view of a portion of FIGURE 1; and

FIGURE 3 is a top plan view, partly in section, of the frame and drive.

In FIGURE 1, a crusher has been shown generally in cluding the followingmain parts, a main frame A which supports a bowl structure B releasablyheld on the main frame by a release mechanism C and arranged to beadjusted by an adjustment mechanism D. The main frame also sup-ports acrushing head E defining a crushing cavity with the bowl.

The main frame A includes a base flange with an upstanding housing 12and a supporting flange 14 for the bowl structure at the upper end. Thebase flange is connected to a center hub 16 by a web structure 18. Thecenter hub supports an eccentric 20 which has a suitable counterweight22 at its upper end overhanging the upper end of the center hub andconnected to a ring gear 23 by bolts 24 or the like, which in turn isdriven by a pinion 25 on a drive shaft 26 which in turn may be driven bya belt and pulley arrangement or any suitable means, not shown.

The drive shaft may be supported by bearings 27 in a sleeve 28 suitablyheld in a boss or journal 29 which is a part of the frame with a pulley30 or the like at the outer end of the shaft.

The lower end of the center hub is closed by a bottom cap 32 whichhouses a thrust bearing arrangement 34 of any suitable type supportingthe eccentric. The hub may have a suitable lubricant inlet connection,as at 36, with outlets at 37, and a suitable bearing sleeve 38 may linethe center hub around the eccentric removably held in by bolts 39 or thelike, in FIGURE 2. The webs around the center hub may be closed on topby a detachable annular support 40 which defines a socket 42 lined witha brass or bronze seat or liner 44 on its upper surface and describedabout a center of gyration X, for supporting the head. The supportitself may be remova bly held on the main frame by bolts 46 or the like.

The main frame 12 may have the web structure 18 to the center hub 16formed in cross section in a U, an H shape, or in a box or rod shape, asat 48 in FIGURE 3. It is preferred to use three such webs or arms. Oneof the arms 48 supports the drive shaft and sleeve, as shown in FIGURE3, and the webs flare at 50 inside of the supporting ledge 51. The webs,center hub and supporting ledge thus form an upwardly opening pocket 52so that when the head support 40 is removed, the drive pinion 25 may beinserted from above. To assemble the drive, the sleeve 28 with bearingsand drive shaft are inserted through the arm 48. The drive pinion 25 islowered into the pocket and the end 54 of the drive shaft is insertedinto the pinion while the pinionis suspended in the pocket. Then thepinion may 'be connected to the end of the drive shaft by suitable bolts56 orthe like which pull the pinion up on a tapered bushing or sleeve57. Thus the inside of the arm 48 may have a much smaller dimension thanthe pinion. Further the forces applied to the drive shaft are absorbedin the arm of the frame. The drive pinion may be readily removable, ifremoval is desired.

It will be realized that whereas a practical and operative device hasbeen described and claimed, nevertheless many changes may be made in thesize, shape, number and disposition and relation of parts withoutdeparting from the spirit of the invention. It is therefore wished thatthe description and drawings be taken as in a broad sense illustrativeor diagrammatic rather than as limiting to the precise showing.

The use, operation and function of the invention are as follows:

In prior crushers, the countershaft, such as at 26 in the presentapplication, has been inserted through a :box type structure in theframe of the crusher, note for example Patent No. 2,860,837, issuedNovember 18, 1958. The opening in the frame has previously been madelarge enough to accept the pinion, as at 25 in FIGURE 1. This has thedisadvantage of requiring an excessively large opening in the crusherand reduced strength in the frame.

In the present invention, the drive to the head is the countershaft in abox which joins the outer housing of the main frame and the centersupport for the head. The inside dimension of the box does not have tobe large enough to allow the pinion to be inserted, since the pinion isdropped down into the pocket in the main frame from above and thecountershaft is then connected to the pinion. This allows the drive tocome in through one of the arms between the outer housing and the centersupport. This has the advantage that the high torques and stresses fromthe drive are supported directly by one of the frame arms. In effect,the countershaft is supported in a structure of maximum strength.

We claim:

1. In a gyratory crusher, a circumferential main frame, a generallyupright center hub therein connected to the main frame by at least threeradially disposed webs, the hub being constructed to center and supporta crushing head for gyration in the frame, and a drive to the headincluding a rotatably mounted drive shaft to transmit the drive to thehead, a boss formed in one of the radially disposed webs for enclosingand supporting the drive shaft, a pinion removably mounted on the innerend of the shaft of a diameter greater than the inside of the boss, andan upwardly opening pocket in the webs at the inner end of the boss suchthat, during assembly, the pinion may be lowered into the pocket andconnected to the shaft when it is inserted through the boss.

2. In a gyratory crusher, a circumferential main frame, a generallyupright center hub therein, a plurality of generally radially disposedarms connecting the center hub to the main frame, the hub beingconstructed to center and support a crushing head for gyration in theframe, and a drive to the head including a drive shaft rotatably mountedin one of the arms to transmit the drive to the head, a pinion removablymountable on the inner head of the shaft, such pinion having an exteriordiameter greater than the inside diameter of the arm in which the shaftis mounted, the arms being formed and adapted to permit the pinion to bepositioned in alignment with the shaft when the shaft is insertedthrough the arm.

3. In a gyratory crusher, a circumferential main frame, a generallyupright center hub therein, a plurality of arms connecting the centerhub to the main frame, the hub 3 4 being constructed to center andsupport a crushing head References Cited by the Examiner for gyration inthe frame, and a drive to the head includ- UNITED STATES PATENTS ing adrive shaft rotatably mounted in one of the arms 961,084 6/1910 De Wein241208 to transmit and drive the head, a pinion removably mountable onthe inner head of the shaft, such pinion having 5 FOREIGN PATENTS anexterior diameter greater than the inside diameter of 770,261 3/1957Great Britain,

the arm in which the shaft :is mounted, and means for connecting thepinion to the inner end of the shaft after WILLIAM R, JR., PrimaryExammer.

the shaft is in place in the arm. H. F. PEPPER, Assistant Examiner.

1. IN A GYRATORY CRUSHER, A CIRCUMFRENTIAL MAIN FRAME, A GENERALLYUPRIGHT CENTER HUB THEREIN CONNECTED TO THE MAIN FRAME BY AT LEAST THREERADIALLY DISPOSED WEBS, THE HUB BEING CONSTRUCTED TO CENTER AND SUPPORTA CRUSHING HEAD FOR GYRATION IN THE FRAME, AND A DRIVE TO THE HEADINCLUDING A ROTATABLY MOUNTED DRIVE SHAFT TO TRANSMIT THE DRIVE TO THEHEAD, A BOSS FORMED IN ONE OF THE RADIALLY DISPOSED WEBS FOR ENCLOSINGAND SUPPORTING THE DRIVE SHAFT, A PINION REMOVABLY MOUNTED ON THE INNEREND OF THE SHAFT OF A DIAMETER GREATER THAN THE INSIDE OF THE BOSS, ANDAN UPWARDLY OPENING POCKET IN THE WEBS AT THE INNER END OF THE BOSS SUCHTHAT, DURING ASSEMBLY, THE PINION MAY BE LOWERED INTO THE POCKET ANDCONNECTED TO THE SHAFT WHEN IT IS INSERTED THROUGH THE BOSS.